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Finding the Fourth Proportional to 248,709, 343,218.42 and 135,531.78

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Solution

The fourth proportional to 248,709, 343,218.42 and 135,531.78 is: 187,033.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,709 : 343,218.42 = 135,531.78 : x
  2. Step 2: Convert to fraction form
    248,709/343,218.42 = 135,531.78/x
  3. Step 3: Cross multiply
    248,709x = 343,218.42 × 135,531.78
  4. Step 4: Simplify right side
    248,709x = 46,517,003,391.39
  5. Step 5: Solve for x
    x = 46,517,003,391.39/248,709
  6. Step 6: Final answer
    x = 187,033.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.